panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: fpanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 689
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*114873 11791 0 0 0 1 syz-executor.1
273787 54345 0 0x2004 0x4000000 0 syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x174 sys/kern/subr_prf.c:208
__assert(ffffffff81f7eb2c,ffffffff81f6b8b7,2b1,ffffffff81f50acf) at __assert+0x2e sys/kern/subr_prf.c:155
proc_trampoline_mp() at proc_trampoline_mp+0x13b
end trace frame: 0x0, count: 11
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 879
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x174 sys/kern/subr_prf.c:208
__assert(ffffffff81f7eb2c,ffffffff81f6b8b7,2b1,ffffffff81f50acf) at __assert+0x2e sys/kern/subr_prf.c:155
proc_trampoline_mp() at proc_trampoline_mp+0x13b
end trace frame: 0x0, count: -4
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020c3f240
rbx 0xffff800020c3f2f0
rdx 0xffffffff81f89e77 apollo_pio_rec+0x9e22
rcx 0
rax 0
r8 0xffffffff811c43a3 kprintf+0x183
r9 0x1
r10 0x25
r11 0x2e6ac4701fbe1ad3
r12 0x3000000008
r13 0xffff800020c3f250
r14 0x104
r15 0x1
rip 0xffffffff81e2e758 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020c3f230
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=114873 stat=onproc
flags process=0 proc=0
pri=77, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020b392d8,0xffffffff82394e00
process=0xffff800020b8c6a8 user=0xffff800020c3a000, vmspace=0xfffffd807effeb40
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*11791 114873 8839 0 7 0 syz-executor.1
54345 204405 82559 0 4 0x82004 syz-executor.0
54345 273787 82559 0 7 0x4002004 syz-executor.0
8839 292045 35541 0 2 0x2 syz-executor.1
82559 394001 35541 0 3 0x82 nanosleep syz-executor.0
23051 457449 1 0 3 0x100083 ttyin getty
35541 93815 54139 0 3 0x82 thrsleep syz-fuzzer
35541 41770 54139 0 3 0x4000082 nanosleep syz-fuzzer
35541 497298 54139 0 3 0x4000082 thrsleep syz-fuzzer
35541 202805 54139 0 3 0x4000082 thrsleep syz-fuzzer
35541 72406 54139 0 2 0x4000082 syz-fuzzer
35541 353359 54139 0 3 0x4000082 thrsleep syz-fuzzer
35541 108326 54139 0 3 0x4000082 thrsleep syz-fuzzer
35541 430563 54139 0 3 0x4000082 thrsleep syz-fuzzer
35541 112142 54139 0 3 0x4000082 thrsleep syz-fuzzer
35541 9726 54139 0 3 0x4000082 thrsleep syz-fuzzer
54139 508554 31469 0 3 0x10008a pause ksh
31469 342951 56689 0 3 0x92 select sshd
56689 286088 1 0 3 0x80 select sshd
29156 515169 81444 74 3 0x100092 bpf pflogd
81444 166228 1 0 3 0x80 netio pflogd
25448 423406 68944 73 3 0x100090 kqread syslogd
68944 347870 1 0 3 0x100082 netio syslogd
62149 118572 1 77 3 0x100090 poll dhclient
38110 343418 1 0 3 0x80 poll dhclient
81774 187088 0 0 3 0x14200 pgzero zerothread
8815 250958 0 0 3 0x14200 aiodoned aiodoned
88477 280076 0 0 3 0x14200 syncer update
53324 310529 0 0 3 0x14200 cleaner cleaner
86197 506767 0 0 3 0x14200 reaper reaper
17768 59303 0 0 3 0x14200 pgdaemon pagedaemon
62100 475910 0 0 3 0x14200 bored crynlk
51640 244886 0 0 3 0x14200 bored crypto
46036 42337 0 0 3 0x40014200 acpi0 acpi0
76507 370510 0 0 3 0x40014200 idle1
25312 480070 0 0 3 0x14200 bored softnet
63973 396480 0 0 3 0x14200 bored systqmp
94094 444029 0 0 3 0x14200 bored systq
43474 100464 0 0 3 0x40014200 bored softclock
93496 322690 0 0 3 0x40014200 idle0
84308 250031 0 0 3 0x14200 bored smr
1 126511 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 54345 (syz-executor.0) thread 0xffff800020b392d8 (273787)
exclusive rrwlock inode r = 0 (0xfffffd807dc9ce68) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547
#0 witness_lock+0x594 sys/kern/subr_witness.c:1201
#1 _rw_enter+0x45d sys/kern/kern_rwlock.c:280
#2 _rrw_enter+0x60 sys/kern/kern_rwlock.c:410
#3 VOP_LOCK+0x57 sys/kern/vfs_vops.c:602
#4 vn_lock+0x6e sys/kern/vfs_vnops.c:549
#5 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 cache_lookup+0x300 sys/kern/vfs_cache.c:224
#7 ufs_lookup+0x1d7 sys/ufs/ufs/ufs_lookup.c:162
#8 VOP_LOOKUP+0x67 sys/kern/vfs_vops.c:90
#9 vfs_lookup+0x556 sys/kern/vfs_lookup.c:523
#10 namei+0x4b2 sys/kern/vfs_lookup.c:224
#11 check_exec+0x83 sys/kern/kern_exec.c:123
#12 sys_execve+0x173 sys/kern/kern_exec.c:298
#13 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#13 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574
#14 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8234a3d0) locked @ /syzkaller/managers/multicore/kernel/sys/kern/sched_bsd.c:439
#0 witness_lock+0x594 sys/kern/subr_witness.c:1201
#1 ___mp_acquire_count+0x67 sys/kern/kern_lock.c:231
#2 mi_switch+0x3ca sys/kern/sched_bsd.c:439
#3 sleep_finish+0x110 sys/kern/kern_synch.c:312
#4 sleep_finish_all+0x34 sleep_finish_timeout sys/kern/kern_synch.c:336 [inline]
#4 sleep_finish_all+0x34 sys/kern/kern_synch.c:157
#5 tsleep+0x1c2
#6 single_thread_set+0x3d1 single_thread_wait sys/kern/kern_sig.c:2040 [inline]
#6 single_thread_set+0x3d1 sys/kern/kern_sig.c:2031
#7 sys_execve+0x62 sys/kern/kern_exec.c:269
#8 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#8 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574
#9 Xsyscall+0x128
Process 8839 (syz-executor.1) thread 0xffff800020b399e0 (292045)
exclusive rrwlock inode r = 0 (0xfffffd807dc9c808) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_ihash.c:140
#0 witness_lock+0x594 sys/kern/subr_witness.c:1201
#1 _rw_enter+0x45d sys/kern/kern_rwlock.c:280
#2 _rrw_enter+0x60 sys/kern/kern_rwlock.c:410
#3 ufs_ihashins+0x6d sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x143 sys/ufs/ffs/ffs_vfsops.c:1352
#5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392
#6 ufs_mkdir+0x10f sys/ufs/ufs/ufs_vnops.c:1164
#7 VOP_MKDIR+0x76 sys/kern/vfs_vops.c:449
#8 domkdirat+0x12d sys/kern/vfs_syscalls.c:2881
#9 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#9 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574
#10 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806e2a5808) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547
#0 witness_lock+0x594 sys/kern/subr_witness.c:1201
#1 _rw_enter+0x45d sys/kern/kern_rwlock.c:280
#2 _rrw_enter+0x60 sys/kern/kern_rwlock.c:410
#3 VOP_LOCK+0x57 sys/kern/vfs_vops.c:602
#4 vn_lock+0x6e sys/kern/vfs_vnops.c:549
#5 vfs_lookup+0xf5 sys/kern/vfs_lookup.c:387
#6 namei+0x4b2 sys/kern/vfs_lookup.c:224
#7 domkdirat+0x81 sys/kern/vfs_syscalls.c:2866
#8 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#8 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9527 6428K 6441K 78643K 10884 0 0
pcb 25 9K 11K 78643K 493 0 0
rtable 100 3K 4K 78643K 474 0 0
ifaddr 62 14K 15K 78643K 159 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1486 0 0
iov 0 0K 24K 78643K 102 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1199 75K 75K 78643K 1712 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 11 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 1K 1K 78643K 72 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12628 0 0
file desc 6 17K 19K 78643K 768 0 0
sigio 0 0K 0K 78643K 9 0 0
proc 56 63K 71K 78643K 527 0 0
subproc 64 65538K 67586K 78643K 244 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 146 0 0
in_multi 33 2K 2K 78643K 138 0 0
ether_multi 1 0K 0K 78643K 8 0 0
mrt 0 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 60 265K 265K 78643K 60 0 0
exec 1 0K 1K 78643K 283 0 0
pfkey data 0 0K 0K 78643K 2 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 84 20K 21K 78643K 3402 0 0
UVM aobj 30 2K 2K 78643K 32 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 33 0 0
NDP 15 0K 0K 78643K 49 0 0
temp 179 2379K 2445K 78643K 5503 0 0
kqueue 0 0K 0K 78643K 2 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 9 0 5 1 0 1 1 0 8 0
inpcbpl 280 436 0 429 1 0 1 1 0 8 0
plimitpl 152 53 0 45 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtentry 112 88 0 48 2 0 2 2 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 43 0 43 1 1 0 1 0 8 0
tcpcb 544 167 0 163 1 0 1 1 0 8 0
nd6 48 14 0 10 1 0 1 1 0 8 0
ppxss 1128 14 0 14 4 4 0 1 0 8 0
pffrent 40 1 0 1 1 1 0 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 26 0 15 1 0 1 1 0 8 0
pfstkey 112 26 0 15 1 0 1 1 0 8 0
pfstate 328 26 0 15 2 0 2 2 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 396 0 208 12 0 12 12 0 8 0
art_table 32 397 0 208 2 0 2 2 0 8 0
art_node 16 85 0 51 1 0 1 1 0 8 0
sysvmsgpl 40 5 0 2 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 70 0 60 1 0 1 1 0 8 0
shmpl 112 30 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 2851 0 1411 48 1 47 47 0 8 0
ffsino 272 2851 0 1411 97 1 96 96 0 8 0
nchpl 144 4160 0 2511 62 0 62 62 0 8 0
uvmvnodes 72 3039 0 0 56 0 56 56 0 8 0
vnodes 200 3039 0 0 160 0 160 160 0 8 0
namei 1024 12620 0 12619 1 0 1 1 0 8 0
percpumem 16 30 0 0 1 0 1 1 0 8 0
scsiplug 64 5 0 5 3 3 0 1 0 8 0
scxspl 192 12226 0 12226 8 7 1 6 0 8 1
sigapl 432 953 0 937 2 0 2 2 0 8 0
futexpl 56 8928 0 8928 1 0 1 1 0 8 1
knotepl 112 274 0 255 1 0 1 1 0 8 0
kqueuepl 104 205 0 203 1 0 1 1 0 8 0
pipepl 112 710 0 691 1 0 1 1 0 8 0
fdescpl 488 954 0 937 3 0 3 3 0 8 0
filepl 152 6076 0 5976 5 0 5 5 0 8 1
lockfpl 104 261 0 260 3 2 1 1 0 8 0
lockfspl 32 296 0 295 3 2 1 1 0 8 0
sessionpl 112 24 0 13 1 0 1 1 0 8 0
pgrppl 48 35 0 24 1 0 1 1 0 8 0
ucredpl 96 1386 0 1377 1 0 1 1 0 8 0
zombiepl 144 937 0 937 1 0 1 1 0 8 1
processpl 840 969 0 937 4 0 4 4 0 8 0
procpl 600 2619 0 2577 4 0 4 4 0 8 0
srpgc 64 30 0 30 2 1 1 1 0 8 1
sockpl 384 855 0 836 6 3 3 4 0 8 1
mcl64k 65536 229 0 0 29 2 27 29 0 8 1
mcl16k 16384 5 0 0 1 0 1 1 0 8 0
mcl12k 12288 5 0 0 1 0 1 1 0 8 0
mcl9k 9216 7 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 9 0 0 2 0 2 2 0 8 0
mcl2k2 2112 6 0 0 1 0 1 1 0 8 0
mcl2k 2048 124 0 0 15 0 15 15 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 341 0 0 18 0 18 18 0 8 0
bufpl 256 7844 0 1146 419 0 419 419 0 8 0
anonpl 16 119652 0 112478 74 28 46 52 0 125 8
amapchunkpl 152 5348 0 5255 13 8 5 9 0 158 0
amappl16 192 5098 0 4634 67 34 33 36 0 8 8
amappl15 184 370 0 366 1 0 1 1 0 8 0
amappl14 176 94 0 90 1 0 1 1 0 8 0
amappl13 168 74 0 65 1 0 1 1 0 8 0
amappl12 160 76 0 74 1 0 1 1 0 8 0
amappl11 152 330 0 315 1 0 1 1 0 8 0
amappl10 144 390 0 387 1 0 1 1 0 8 0
amappl9 136 603 0 599 1 0 1 1 0 8 0
amappl8 128 161 0 147 1 0 1 1 0 8 0
amappl7 120 363 0 358 1 0 1 1 0 8 0
amappl6 112 119 0 111 1 0 1 1 0 8 0
amappl5 104 134 0 120 1 0 1 1 0 8 0
amappl4 96 1141 0 1111 2 1 1 2 0 8 0
amappl3 88 283 0 276 1 0 1 1 0 8 0
amappl2 80 7439 0 7381 2 0 2 2 0 8 0
amappl1 72 30421 0 29978 25 15 10 20 0 8 0
amappl 72 2897 0 2860 1 0 1 1 0 75 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma64 64 259 0 259 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 17 0 17 1 1 0 1 0 8 0
aobjpl 64 31 0 2 1 0 1 1 0 8 0
uaddrrnd 24 954 0 937 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 954 0 937 1 0 1 1 0 8 0
vmmpekpl 168 12185 0 12161 2 0 2 2 0 8 0
vmmpepl 168 110066 0 108543 111 30 81 81 0 357 10
vmsppl 360 953 0 937 2 0 2 2 0 8 0
pdppl 4096 1916 0 1874 6 0 6 6 0 8 0
pvpl 32 337244 0 326797 162 39 123 135 0 265 20
pmappl 224 953 0 937 1 0 1 1 0 8 0
extentpl 40 39 0 25 1 0 1 1 0 8 0
phpool 112 610 0 6 18 0 18 18 0 8 0